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// Copyright 2023 The Dawn & Tint Authors
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#ifndef SRC_TINT_LANG_CORE_IR_ACCESS_H_
#define SRC_TINT_LANG_CORE_IR_ACCESS_H_
#include <string>
#include "src/tint/lang/core/ir/operand_instruction.h"
#include "src/tint/utils/rtti/castable.h"
namespace tint::core::ir {
/// An access instruction in the IR.
class Access final : public Castable<Access, OperandInstruction<3, 1>> {
public:
/// The offset in Operands() for the object being accessed
static constexpr size_t kObjectOperandOffset = 0;
/// The base offset in Operands() for the access indices
static constexpr size_t kIndicesOperandOffset = 1;
/// Constructor (no results, no operands)
Access();
/// Constructor
/// @param result the result value
/// @param object the accessor object
/// @param indices the indices to access
Access(InstructionResult* result, Value* object, VectorRef<Value*> indices);
~Access() override;
/// @copydoc Instruction::Clone()
Access* Clone(CloneContext& ctx) override;
/// @returns the object used for the access
Value* Object() { return Operand(kObjectOperandOffset); }
/// @returns the object used for the access
const Value* Object() const { return Operand(kObjectOperandOffset); }
/// Adds the given index to the end of the access chain
/// @param idx the index to add
void AddIndex(Value* idx) { AddOperand(operands_.Length(), idx); }
/// @returns the accessor indices
tint::Slice<Value* const> Indices() { return operands_.Slice().Offset(kIndicesOperandOffset); }
/// @returns the accessor indices
tint::Slice<const Value* const> Indices() const {
return operands_.Slice().Offset(kIndicesOperandOffset);
}
/// @returns the friendly name for the instruction
std::string FriendlyName() const override { return "access"; }
};
} // namespace tint::core::ir
#endif // SRC_TINT_LANG_CORE_IR_ACCESS_H_